Calculating machines



Feb. 1, 1966 w. voM DORP ETAL 3,232,532

CALCULATING MACHINES Filed March 9, 1965 2 Sheets-Sheet 1 Feb. l, 1966w. voM DORP ETAL 3,232,532

CALCULATING MACHINES Filed March 9, 1965 2 Sheets-Sheet 2 Fig? lm/entors.I

United States Patent O 3,232,532 CALCULATING MACHINES Walter Vom Dorpand Edgar Dietrich, Rheydt, Germany,

assignors to Mannesmann-Meer Aktiengesellschaft, Munchen-Gladbach,Germany, a corporation of Ger- Filed Mar. 9, 1965, Ser. No. 438,236Claims priority, application Germany, Mar. 9, 1964, M 60,2412 4 Claims.(Cl. 23S-79.5)

This invention relates to calculating machines.

More particularly this invention relates to calculating machines of theslide-rule type.

The invention will be described as developed for use in determining rollspeeds for multipass rolling mills although it will be appreciated thatthe invention is no-t limited to such application.

As is well known, when carrying out multistage reduction upon a tubularingot which has been heated to the roll temperature by sending the ingotthrough several suc- ,the operator .with instructions for determiningthe necessary sequence of roller speeds, these instructions usuallybeing in the form of data sheets in which appropriate calculationfactors are presented in tabular and graph form.

The fact that the operator h-as to be given such instructions andinformation regarding the various factors involved in setting the rollerspeeds, demonstrates how complex are the theoretical considerations andmathematical knowledge required in order to ensure proper adjustment ofthe 'installation both prior to and during production.

In order to considerably simplify the task of the operator, it isdesirable for the supplier to provide an aid by means of which theoperator, in accordance with a predetermined scheme and without the needfor knowledge of the fundamental principles involved, could determineroller speeds at each particular stand and thus ensure the desireddeformation, it being also desirable that the operator should be able todetermine these values for diiferent types of installation.

One method of solving this problem is for the supplier to provide sliderule devices of known type, the required values being calculated byappropriate manipulation for slides and cursors. However, it must beborne in mind that it is necessary for the supplier either to providevarying numbers of interchangeable slides (for example if it is requiredto deal with what are known as combined multipass rolling millinstallations), or to avoid this, by providing several scales ononeslide.

However, all these approaches suffer the disadvantage that the devicesconcerned either involve interchangeable parts, which may lead toconfusion, or, in the event that several scales are carried on oneslide, detract from the straightforwardness of operation and thus demanda great deal of attention and accuracy on the part of the operator.

One object of the present invention is to provide a calculating machinein which the above discussed disadvantages are overcome at least inpart.

According to the present invention, a calculating ma` chine, of theslide-rule type, includes a frame member, a

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longitudinally extending body member mounted on said frame member so asto be rotatable relative thereto about a longitudinal axis of said bodymember, a number of slide members arranged in longitudinally extendinggrooves about the outer periphery of said body member, said slidemembers being adapted to slide in the longitudinal direction in saidvgrooves, scale markings on said slide members and scale markings on saidbody member, and a number of cursors slidably mounted on said bodymember so as to be able to slide in the longitudinal direction alongsaid body member, each of said cursors being adapted to provideco-operation between certain of said scale markings on said slidemembers and certain of said scale markings on said body member.

One embodiment of a calcul-ating machine in accordance with the presentinvention will now be described by way of example with reference to theaccompanying drawings, in which:

FIGURE l is a part-sectional side elevation of the machine, and

FIGURE 2 is a cross-sectional elevation taken perpendicularly to thelongitudinal axis of the machine.

Referring now to the drawings, the machine includes a body member 1which is rotatably mounted on spindles 2 and 3 which are mo-unted in aIframe member 4. The spindle 2 is xcd in the frame 4 and the body 1rotates on its stub. One end of the spindle 3 is lixed in the body 1 andthe other end is rotatable in a hole in the frame 4, there beingprovided a pinch-nut assembly 5 whereby the body 1 may be locked in anyrotational position.

Provided on the spindle 2 is a hollow arm 6 which is rotatable on thespindle 2 relative to the frame 4, this arm 6 being locked in anydesired position by means of a further pinch-nut assembly 7. The arm 6carries a lamp housing and reflector 8 whereby the body 1 may beilluminated.

Arranged in slots about the periphery of the body 1 are slides 9, theseslides 9 carrying markings which co operate with further markings on thebody 1. Each of the slides 9 is bridged by one of anumber of cursors 1t)and 13, whereby each slide 9 and its associated markings may be used inthe manner of a conventional straight slide rule.

Arranged within the body 1, mounted so as to be rotatable about its axis16 is a cylinder 11 which carries, arranged in slots about itsperiphery, six slides 12, each of which carries markings relevant to aparticular set of calculations.

Provided in the body 1 is a slot through which one slide 12 at a time onthe cylinder 11 may be Seen. The cursor 13 is curved so as to cover twosides of the body 1, including the slot through which the slides 12 maybe seen and a particular one of the slides 9 such that calculationsinvolving the markings on any one of the sli-des 12 and the particularone of the slides 9 may be carried out.

The cylinder 11 is locked in any desired rotational position by means ofa spring-loaded hexagonal stop-pin 14 which (zo-operates with ahexagonal hole in the end wall of the body 1. This stop-pin 14 may bereleased by pressing in a wheel 15, the cylinder 11 then being rotatedby rotation of the wheel 1S.

Although in the embodiment described four slides 9 and six slides 12 areprovided it will be appreciated that any number may be provided independence upon the number of types of calculations the machine isrequired to carry out.

It will be further appreciated that although in the embod'ment describedthe body 1 is basically rectangular in cross-section but having onerounded corner, it may be constructed having any convenientcross-section shape, and that the markings carried by the body 1 may becar- 3 ried by interchangeable members iixed to the body l. as required.l

What we claim as our invention and desire to Secure by Letters Patentoilthe lUnited States is:

1. A calculating machine, of the slide-rule type, in cluding a framemember, a longitudinally extending body member mounted on said framemember so as to be rotatable relative thereto about a longitudinal axisof said body member, a numebr of slide members connected near the outerperiphery to said body member and ylongitudinally slidable relativethereto, scale markings on said slide members and scale markings on saidbody member, and a number of cursors slidably mounted on said bodymember so as to be able .to slide in the longitudinal direction alongsaid body member, each of Said cursors being adapted to provideco-operation between certain of said scale markings on said slidemembersl and certain of said scale markings on said body member, acylindrical member arranged within said body member and adapted to berotatable about'its longitudinal axis relative to said body member, anumber of furtherslide mebers slidably connected near the outerperiphery'to said cylindrical member, each of said further slide membersbeing provided with scale markings, said body member being formed with alongitudinally extending slot therein such -that by rotation of saidcylindrical member said further slide members may be viewed individuallythrough said slot, and locking means whereby said cylindrical member maybe locked in any rotational position at which one of saidfurther slidemembers may be so viewed.

2. A calculating machine, of the slide-rule type, including a framemember, a longitudinally extending body member mounted on said framemember so as to be rotatable relative thereto about a longitudinal axisof said body member, a number of slide members arranged inlongitudinally extending grooves about the outer periphery of said bodymember, said slide members being adapted to slide in the longitudinaldirection in said grooves, scale markings on said slide members andscale markings on said body member, and a number of cursors slidablymounted on said body member so as to be able to slide in thelongitudinal direction along said body member, each of said cursorsbeing adapted to provide co-operation between certain of said scalemarkings on said slide members and certain of said scale markings onsaid body member, including a cylindrical member arranged Within saidbody member and adapted to be rotatable about its longitudinal axisrelative to said body member, a number of further slide members arrangedin longitudinally extending grooves about the outer periphery of saidcylindrical member, each of said futher slide members being providedwith scale markings, said body member being formed with a longitudinallyextending slot therein such that by rotation of said cylindrical membersaid further slide members may be viewed indivdiually through said slot,and locking means whereby said cylindrical member may be locked in anyrotational position at which one of said further slide members may ybeso Viewed.

3. A calculating machine as claimed in claim 2, wherein one of saidcursors is adaptedl to provide cooperation between the scale markings onone of said slide members on said body member and the scale markings onthe particular one of said further slide members visible at any instant.

4. A calculating machine as claimed in claim 2,'wherein said lockingmeans comprises a polygonalfin-sec'tion spring-loaded pin which in thelocking position is held in co-operaton with said body member, thenumber of side 'faces on said pin being equal to the number of furtherVslide members on said cylindrical body.

References Cited by the Examiner UNITED STATES PATENTS 249,117 11/1881Thacher 23S-79.5

998,414 7/ 1911 Smith 235-87 1,343,660 6/1920 Christopher 235-871,433,186 10/1922 Doemen 235-79.5 1,535,377 4/1925 Radu 177-177 X2,034,189 3/1936 Hogan 235-87 X 2,088,395 7/1937 Bayard. 2,207,375 7/1940 Friedell. 2,606,390 5/1950 Sears 235-87 2,643,823 6/1953 Quillinan23S- 479.5 3,000,558 9/1961 Jaynes 23S-86 FOREIGN PATENTS 246,677 5/1912 Germany. LEO SMILOW, Primary Examiner.

C. G. COVELL, Assistant Examiner.

1. A CALCULATING MACHINE, OF THE SLIDE-RULE TYPE, INCLUDING A FRAMEMEMBER, A LONGITUDINALLY EXTENDING BODY MEMBER MOUNTED ON SAID FRAMEMEMBER SO AS TO BE ROTATABLE RELATIVE THERETO ABOUT A LONGITUDINAL AXISOF SAID BODY MEMBER, A NUMBER OF SLIDE MEMBERS CONNECTED NEAR THE OUTERPERIPHERY TO SAID BODY MEMBER AND LONGITUDINALLY SLIDABLE RELATIVETHERETO, SCALE MARKINGS ON SAID SLIDE MEMBERS AND SCALE MARKINGS ON SAIDBODY MEMBER, AND A NUMBER OF CURSORS SLIDABLY MOUNTED ON SAID BODYMEMBER SO AS TO BE ABLE TO SLIDE IN THE LONGITUDINAL DIRECTION ALONGSAID BODY MEMBER, EACH OF SAID CURSORS BEING ADAPTED TO PROVIDECO-OPERATION BETWEEN CERTAIN OF SAID SCALE MARKINGS ON SAID SLIDEMEMBERS AND CERTAIN OF SAID SCALE MARKINGS ON SAID BODY MEMBER ACYLINDRICAL MEMBER ARRANGED WITHIN SAID BODY MEMBER AND ADAPTED TO BEROTATABLE ABOUT ITS LONGITUDNAL AXIS RELATIVE TO SAID BODY MEMBER, ANUMBER OF FURTHER SLIDE MEMBERS SLIDABLY CONNECTED NEAR THE OUTERPERIPHERY TO SAID CYLINDRICAL MEMBER, EACH OF SAID FURTHER SLIDE MEMBERSBEING PROVIDED WITH SCALE MARKINGS, SAID BODY MEMBER BEING FORMED WITH ALONGITUDINALLY EXTENDING SLOT THEREIN SUCH THAT BY ROTATION OF SAIDCYLINDRICAL MEMBER SAID FURTHER SLIDE MEMBERS MAY BE VIEWED INDIVIDUALLYTHROUGH SAID SLOT, AND LOCKING MEANS WHEREBY SAID CYLINDRICAL MEMBER MAYBE LOCKED IN ANY ROTATIONAL POSITION AT WHICH ONE OF SAID FURTHER SLIDEMEMBERS MAY BE SO VIEWED.